[CP2K-user] [CP2K:17148] Re: Expert Advice needed: PERIODIC_EFIELD with metal nano-particle

Krack Matthias (PSI) matthias.krack at psi.ch
Mon Jun 13 11:27:25 UTC 2022


Hi Sam

it seems that you try to restart from an OT run with spin polarization (LSD/UKS ON) using an input in which LSD/UKS is set OFF or not set (the default is OFF), but it is not possible to change the spin-polarization on restart.

The OT run should have written the last converged (spin-polarized) wavefunction to the wfn restart file.

And right, PERIODIC_EFIELD is only implement for OT.
HTH

Matthias

From: "cp2k at googlegroups.com" <cp2k at googlegroups.com> on behalf of Sam Broderick <waveman68 at gmail.com>
Reply to: "cp2k at googlegroups.com" <cp2k at googlegroups.com>
Date: Monday, 13 June 2022 at 12:24
To: "cp2k at googlegroups.com" <cp2k at googlegroups.com>
Subject: [CP2K:17148] Re: Expert Advice needed: PERIODIC_EFIELD with metal nano-particle

The output from the production one (the global run is large show I include the end here:

MD| ***************************************************************************
 MD| Step number                                                            5104
 MD| Time [fs]                                                       2552.000000
 MD| Conserved quantity [hartree]                            -0.262582505304E+04
 MD| ---------------------------------------------------------------------------
 MD|                                          Instantaneous             Averages
 MD| CPU time per MD step [s]                     26.061410            33.822750
 MD| Energy drift per atom [K]           0.374503646625E+03   0.205283418423E+03
 MD| Potential energy [hartree]         -0.262589862674E+04  -0.262592631376E+04
 MD| Kinetic energy [hartree]            0.137757326096E+00   0.119719069562E+00
 MD| Temperature [K]                             376.625724           327.309498
 MD| ***************************************************************************

 Spin 1

 Number of electrons:                                                        435
 Number of occupied orbitals:                                                435
 Number of molecular orbitals:                                               435

 Spin 2

 Number of electrons:                                                        434
 Number of occupied orbitals:                                                434
 Number of molecular orbitals:                                               434

 Number of orbital functions:                                               1975
 Number of independent orbital functions:                                   1975

 Extrapolation method: PS Nth order
 Extrapolation order:  2


 SCF WAVEFUNCTION OPTIMIZATION

  ----------------------------------- OT ---------------------------------------
  Minimizer      : DIIS                : direct inversion
                                         in the iterative subspace
                                         using   7 DIIS vectors
                                         safer DIIS on
  Preconditioner : FULL_SINGLE_INVERSE : inversion of
                                         H + eS - 2*(Sc)(c^T*H*c+const)(Sc)^T
  Precond_solver : DEFAULT
  stepsize       :    0.08000000                  energy_gap     :    0.08000000
  ortho_irac     : CHOL                           irac_degree    :             4
  max_irac       :            50                  eps_irac       :   0.10000E-09
  eps_irac_switch:   0.10000E-01                  eps_irac_quick_exit: 0.100E-04
  on_the_fly_loc : F
  ----------------------------------- OT ---------------------------------------

  Step     Update method      Time    Convergence         Total energy    Change
  ------------------------------------------------------------------------------
     1 OT DIIS     0.80E-01    1.6     0.00000775     -2625.8983262879 -2.63E+03
     2 OT DIIS     0.80E-01    1.7     0.00000405     -2625.8983310938 -4.81E-06
     3 OT DIIS     0.80E-01    1.7     0.00000353     -2625.8983328495 -1.76E-06
     4 OT DIIS     0.80E-01    1.7     0.00000334     -2625.8983350122 -2.16E-06
     5 OT DIIS     0.80E-01    1.8     0.00000315     -2625.8983386726 -3.66E-06
     6 OT DIIS     0.80E-01    1.7     0.00000296     -2625.8983443709 -5.70E-06
     7 OT DIIS     0.80E-01    1.7     0.00000269     -2625.8983545672 -1.02E-05
     8 OT DIIS     0.80E-01    1.7     0.00000249     -2625.8983637011 -9.13E-06
     9 OT DIIS     0.80E-01    1.7     0.00000233     -2625.8983715220 -7.82E-06
    10 OT DIIS     0.80E-01    1.7     0.00000220     -2625.8983782333 -6.71E-06
    11 OT DIIS     0.80E-01    1.8     0.00000210     -2625.8983844367 -6.20E-06
    12 OT DIIS     0.80E-01    1.7     0.00000203     -2625.8983895822 -5.15E-06
    13 OT DIIS     0.80E-01    1.7     0.00000197     -2625.8983941766 -4.59E-06
    14 OT DIIS     0.80E-01    1.7     0.00000191     -2625.8983986569 -4.48E-06
    15 OT DIIS     0.80E-01    1.7     0.00000185     -2625.8984037404 -5.08E-06
    16 OT DIIS     0.80E-01    1.7     0.00000178     -2625.8984097126 -5.97E-06
    17 OT DIIS     0.80E-01    1.7     0.00000166     -2625.8984185968 -8.88E-06
    18 OT DIIS     0.80E-01    1.6     0.00000154     -2625.8984272390 -8.64E-06
    19 OT DIIS     0.80E-01    1.7     0.00000142     -2625.8984357725 -8.53E-06
    20 OT DIIS     0.80E-01    1.7     0.00000130     -2625.8984426842 -6.91E-06
    21 OT DIIS     0.80E-01    1.7     0.00000121     -2625.8984475524 -4.87E-06
    22 OT DIIS     0.80E-01    1.7     0.00000113     -2625.8984512475 -3.70E-06
    23 OT DIIS     0.80E-01    1.7     0.00000106     -2625.8984545255 -3.28E-06
    24 OT DIIS     0.80E-01    1.7     0.00000099     -2625.8984573944 -2.87E-06

 *** SCF run terminated - exceeded requested execution time:   86340.000 seconds.

 *** Execution time now:    86340.037 seconds.

  *** SCF run converged in    24 steps ***


  Electronic density on regular grids:       -869.0000000000        0.0000000000
  Core density on regular grids:              868.9999999985       -0.0000000015
  Total charge density on r-space grids:       -0.0000000014
  Total charge density g-space grids:          -0.0000000014

  Overlap energy of the core charge distribution:               0.00000146582976
  Self energy of the core charge distribution:              -4570.41375350254566
  Core Hamiltonian energy:                                   1458.28031159567945
  Hartree energy:                                             899.55026105138484
  Exchange-correlation energy:                               -412.42098926839282
  Dispersion energy:                                           -0.89428873636523

  Total energy:                                             -2625.89845739440943

  outer SCF iter =    1 RMS gradient =   0.99E-06 energy =      -2625.8984573944
  outer SCF loop converged in   1 iterations or   24 steps


 ENERGY| Total FORCE_EVAL ( QS ) energy [a.u.]:            -2625.898460009454993

 *** MD run terminated - exceeded requested execution time:   86340.000 seconds.

 *** Execution time now:    86343.048 seconds.
On Monday, June 13, 2022 at 12:19:20 PM UTC+2 Sam Broderick wrote:
An additional question: after a global run, where the last step did not converge within the WALLTIME I set in the input:

 *** SCF run terminated - exceeded requested execution time:   86340.000 seconds.

 *** Execution time now:    86340.037 seconds.
What is stored in the restart data? The last converged MD step or the one that did not converge? Could this be why I get this error when I try to start a production run form this? Sorry for the newbie questions.

READ RESTART : WARNING : nspin is not equal

 *******************************************************************************
 *   ___                                                                       *
 *  /   \                                                                      *
 * [ABORT]                                                                     *
 *  \___/                     Reducing nspin is not possible.                  *
 *    |                                                                        *
 *  O/|                                                                        *
 * /| |                                                                        *
 * / \                                                          qs_mo_io.F:708 *
 *******************************************************************************


 ===== Routine Calling Stack =====

            8 read_mo_set_from_restart
            7 calculate_first_density_matrix
            6 scf_env_initial_rho_setup
            5 init_scf_run
            4 qs_energies
            3 qs_forces
            2 qs_mol_dyn_low
            1 CP2K

On Monday, June 13, 2022 at 11:42:26 AM UTC+2 Sam Broderick wrote:
Dear cp2k aficionados,


It seems to me that I have run into a strong limitation of cp2k, but I am not know enough to anything close to sure. My goal: determine spectroscopic response of an organic molecule near a metal nano-particle.

On the one hand, &DIAGONALIZATION is strongly recommended for metals. On the other hand, TRAVIS requires &PERIODIC_EFIELD to determine the polarizability, but this means &OT. I am having severe difficulties with the production run with a thermostat.

Is cp2k the right tool or am I just not doing it right (e.g., something better than DZVP-MOLOPT-SR-GTH and GTH-PBE-q)

Would you please have a look at my .inp and provide me with some tips? My boss is quite dissatisfied with node hour usage while I try to figure this out.

Many, many thanks
Sam
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